500W or 800W spindle, which one is better for Mini Desktop CNC? Comgrow Robo CNC upgrades

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Welcome back to Aurora Tech Channel. Two weeks ago, I reviewed this Comgrow Robo CNC engraver. The stock 60W spindle can cut through the acrylic plate and make a bracket like this, but obviously, it was not powerful enough to make the same bracket with a one-eighth inch aluminum plate. As this machine is quite rigid compared to the CNC 3018, I decided to install a more powerful spindle on it and it should be able to make some aluminum parts.
Besides the spindle upgrade, I will also do some small upgrades to this machine. Let's go through what I have done and the results.
For the 52mm spindle mount, you may download the files from here:
auroratechchan...
I have included the STL, STEP and Fusion 360 format, so you can adjust the leadscrew nut hole according to what type of nut you have.
Comgrow ROBO CNC affiliate links:
Buy from Comgrow Offical website:
bit.ly/3x3uRT0
$229 (Free sales tax, may save another $20 depending on where you live)
Buy from Amazon:
amzn.to/3B9xjGA
500W Spinde:
amzn.to/3EWRZUi (Spindle + PSU + 13 pcs ER11 collet)
amzn.to/3oq5RA7 (Spinde + PSU)
45mm LM8uu bearings x2:
amzn.to/2UKvcd4
POM Leadscrew nut:
amzn.to/3BUmDvG
End Mill:
HQMaster Single flute end mill:
amzn.to/3o0XdYg
Polymaker ASA Temperature Resistant Filament: (For 3D printing the Spindle Mount)
amzn.to/3i4PSFi
Overture ABS filament:
amzn.to/3o1TutE
24v relay x1:
amzn.to/3iNGm8K
16 gauge wire:
amzn.to/3iMvqZe ($6.95 25FT Red +25FT Black)
Acrylic shield (made from 36x24 1/8" thick" sheet)
amzn.to/306k5xL
Related videos:
Fusion 360 Tutorial: Spindle Mount
• Fusion 360 Tutorial fo...
CNC 3018 500W Spinlde, Emergency button, 24V relay upgrades
• The cheapest $149 CNC ...
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Опубликовано:

7 сен 2024

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Комментарии : 114

@ComgrowOfficial 2 года назад

Your analysis is really great! Aurora, we are surprised that you have been so thorough in your evaluation of this machine. The video is awesome.

@aps3000miki 2 года назад

Do you actually realize how much info you packed in this video? You did put this machine in the exact right place. She will be quite useable for many materials and she will scream and shout if she has to cut alu. But still do the job to an acceptable degree. A great hobby and fun tool. A great educational tool. I agree with your spindle conclusion and now I want you to show us all the great things you can create with this simple, little, and cheap machine. Let's design in TinkerCAD and Fusion 360. Let her cut wood, plastics, foam, engravings, make jewelry, decoration stuff, circuit boards, lettering. Show us how to add a laser and a PVC cutter. Show us how she can become a 3D printer. You and Helios are an inspiration. FAN-TAS-TIC

@digitaldave7406 2 года назад

I am in awe of the quality of your productions!

@imqqmi 2 года назад

Adding some cutting fluid and compressed air (about 1-2 bar) helps a great deal too. With such a non rigid machine there's only so much you can do. Light cuts, 1 flute 6mm cutting length endmill, high rpm (17000rpm-ish), 0.5mm doc, 500-800mm/min. Avoid slotting, make the slot wider than the cutter (ie 6mm slot with 4mm cutter) so that chips can get out better. Use ramps to plunge into aluminium instead of dropping straight down. Use aluminium alloys that are easy to mill, so no hardware store bought stuff but 6061, 5083, 7021 or other machinable alloys. If the aluminium is brittle it's probably easy to machine, if it just bends it's probably too gummy.

@klave8511 2 года назад

Wow, great information with numbers too. Thanks!

@AtimatikArmy 2 года назад

I think those recommendations are good, but the high RPM concerns me because if you get the aluminum too hot it will stick to the end mill and then you can forget about anything going right. I know high speed for aluminum is conventional wisdom but I think maybe that's not the best in this situation.

@imqqmi 2 года назад

@@AtimatikArmy that's why compressed air and some cutting fluid helps a lot to cool the cutter and the aluminium. Cutting fluid will lubricate the cutter so the aluminium won't stick as much and reduce drag, which reduce heat. Getting those chips out with compressed are avoids recutting and gumming up the cutter. At lower rpm the cutting forces increase, and with too much compliance will result in more heat as it rubs more than it cuts and deflects the cutter too.

@AtimatikArmy 2 года назад

@@imqqmi Ok I understand you and totally agree.

@johandahlstrom5347 2 года назад

You and your brother make really good videos! I look forward to them every week! Keep up good work!

@avexoidavex3577 Год назад

Thanks to Aurora's parents for raising such a competent and talented child! Before the first use, any spindle should be run idle, without load, so that it runs in. Then there should be no offensive odors. The biggest problem with these spindles is bearing play in the housing. This affects the accuracy of the parts.

@vladnickul 6 дней назад

:)))))))))))))))))))))))))))))))))))))))))))))))

@poppinpenguin0947 2 года назад

Amazing content like always! Purchased my comgrow this weekend can’t wait for it to arrive!! I would love to see a video about your steel structure CNC with the 2.2kw spindle!

@h8510129 Год назад

omg thank you so much. I was almost ready to build a holder for a makita router and go down the rabbit hole of spending a lot of money for an upgrade. Looking at your results the 500w spindle can perfectly do what i want.

@wjohnsaunders 2 года назад

Great video. I wasn't aware of the Comgrow offering, but it looks much better designed than a 3018. You need at least a 300W spindle, ideally 500W, to advance from engraving to actual milling. I am surprised how well it is cutting, you are getting reasonable chips and the cutting area remains clear. A lot of the 3018 videos simply produce a fine dust. There are also brushless spindle motors available that will provide better torque at lower RPM than the ones you have.

@porterfielddynamics 2 года назад

This machine is looking promising, I would love to see more potential improvements with cheapo linear rails but this is looking pretty capable so far.

@AtimatikArmy 2 года назад

I was thinking the same!

@paulocallaghan8303 2 года назад

Love your videos guys! I have 2 daughters and you and your brother are an inspiration - hours and hours of accumulated knowledge experimentation and experience presented and articulated in 10 minutes of quality concise video and links - what's not to like. Keep up the excellent work. Something tells me your futures are bright, I've ordered mine.

@coxbow 2 года назад

Very nice presentation ! Could you share the 500W spindle clamp stl ?

@Lynetk Год назад

Just did the upgrade to the 500w - I removed the original lead screw mount using a soldering iron and just pushing it through very easily like you would do a threaded insert.

@JohnHoranzy 2 года назад

Excellent and concise video with important technical info instead of the common fluff.

@andrewstambaugh8030 2 года назад

Nice tests. I have a 10yr old 6040 table (water-cooled 800W spindle). I upgraded to flood coolant, and it significantly improved my cutting capabilities. I used a fountain pump and some screens to filter, water soluble machining fluid/coolant, a catch tray with raised sealed sides and it all flows down to a hole and into a rubbermade tote with a pump. Hand spraying coolant didn't even come close when I tried to do that for a couple projects early on.

@silmaz40 Год назад

Thank you very much for this wonderful informative video.. If I hadn't followed you, I would have bought an 800watt motor for nothing.. I will be a loyal follower from now on.

@tarunarya1780 2 года назад

Having watched your videos, I wanted to say you are great. You are precise, succinct, detailed and innovative. I hope your channel grows a lot.

@Badge124 2 года назад

What a great channel! The information packed into these videos is remarkable! Thanks for doing this!

@DennisMurphey 2 года назад

Another well done Video thank you both so very much. I have needed a Milling machine for train parts but off course a real mill is huge and expensive. I never dreamed we could see $200 CNC Mill tables such strong capability. I am selling my Fender Guitar amplifier to get one. I could never play very well anyway. I still have my self made Fender 5 watt clone converted from an old signal tracer. Thanks Again folks, excellent work. Dennis

@kirk5452 2 года назад

This is perfect, can't wait to try this mod. Already have everything I need but the motor!

@tgirard123 2 года назад

You're more than likely getting chip welding because you're not clearing the chips away. It's super important on these little machines that you clear the chips. A little air bursting will do the job or a good vacuum near the bit. Also, anchoring the aluminum with tape will work fairly well but you really want to have it physically anchored down. It's all about mass and vibration. Any kind of movement can really make it difficult to get a clean cut

@avejst 2 года назад

Interesting leaning curve 👍😃 Thanks for sharing your experience with all of us 👍😀

@jean-pierresedaghat3557 2 года назад

Amazing content, detailed, clear, easy to understand, keep the great work !

@JBCUSTOMBAITS 3 месяца назад

Great content, 🎉 appreciate your time and dedication.

@GreenAppelPie 2 года назад

I’m a bit surprised no lubricant is being used here. I was a machining out of high school for several days ears and always used lubricant on metal.

@TheM750 2 года назад

You don't /really/ need cutting fluid for aluminum. It doesn't hurt, but it's fine to cut dry.

@creepinonthebabes 2 года назад

i would use at least 2 flute for aluminum, i like to mostly stick with 4 flutes. and again keep the flutes as short as possible for the job.

@TheM750 2 года назад

Also the quality of the endmills is important too. I generally use LMT-Onsrud cutters. I'm a huge fan of their Super O single flute endmills, both for plastic and aluminum.

@sgardner 2 года назад

Genius. Great video. Looking forward to watching more.

@HyroDaily 2 года назад

Super cool, I look fwd to messing with one of these.

@vapoureyes Год назад

You will go far .👍 so I’ve added you to my favourites.

@barbatocedric4246 2 года назад

It would be interesting to compare to BLDC spindle of the same power, it's more expensive but the torque curve should be better. You can find some from 300W-400-500W (0.4 to 0.6 nm 12K rpm), 600W (torque unknow 9.K rpm) up to 900W and 2N.m oftorque (6K rpm). Collet on these motor are from ER11 to ER20.

@tonywardle-winship5744 Год назад

First a thumps up for your good work. I watched this video two weeks ago as I was expecting an 800w to arrive. So it arrived today with a 100v power supply. I installed on my own 3018 I build with 16mm linear rods on X & Y and liner rails on Z axis with Nema 23/24 steppers. I found it smooth running with little runout, even near 20Krpm. I don' expect it to run like my 1.5Kw spindle which is very ridged with 4 x bearings and more controllable via the VFD. I had similar problems to you a long time ago. You need rigidity and bigger steppers to have the torque for non ferris metal. The 800w motor does have replaceable carbon brushes if you want it, it should be ok, as the bearing are the same as the 500 watt. I wouldn't use it on my main CNC which has heavy use

@freedomofsci 2 года назад

My new favorite RU-vidr

@FilmFactry 2 года назад

Just what I wanted to know!

@JPToto 2 года назад

I look forward to every one of these videos. Well done, as usual. This definitely helps consider my spindle options. The 800w spindle doesn't seem worth it. Thank you!

@danam664 Год назад

I enjoy watching your videos and reviews. These mods are too complicated for my needs. Can you recommend a reasonably priced stock built machine that will carve into aluminium and brass?

@marutiroma6295 Год назад

Hi Aurora, can you tell me how to remove the whole ER 11, not just the collet, from my Spindle 500? A thousand thanks. You and your brother are the best!

@rsilvers129 2 года назад

Your shopping list was useful.

@paulurbanus3598 7 месяцев назад

How do you secure the aluminum plate (to be milled) to the blue painters tape. In an earlier video you mentioned super glue. How is the super glue removed from the aluminum or acrylic workpiece? Of particular interest is removing the super glue from an acrylic workpiece without damaging the acrylic surface.

@Lynetk 2 года назад

Great video as always. There is no link for the 500w spindle in the description.

@AuroraTech 2 года назад

Thanks for reminding me, link just added.

@ottospoelstra2481 2 года назад

The emergency twist return button is not meant to be used like this its an emergency stop button so its needs to stop the machine instead in combination with a relay you can use it as an emergency button

@E_y_a_l 2 года назад

she knows what this type of button is for, that switch doesn't originally belong to the machine, she needed a large switch and that what she had lying around so she used it.

@Noorimachinery Год назад

Good job 👏 10:17

@neffk 2 месяца назад

At 8:49, the chips on the plate (far from the cutter) are dancing around. I think the aluminum bed is too flexible.

@PATRIK67KALLBACK 2 года назад

Nice upgrades!

@lachlanlander6002 Год назад

as far as I can tell by the dimensions of the 800W spindle is just an overclocked 500W spindle

@carlospenagos1489 8 дней назад

Hola, los spindle de 2.2 enfriados por agua sirven con nemas 23? E visto varias cnc dead de 800 dólares y sus nemas son solo de 23 Hi, are the 2.2 water cooled spindles suitable for nema 23? I have seen several cnc dead of 800 dollars and their nems are only 23

@wolfrobots118 Год назад

You are brilliant

@crozwayne 2 года назад

Spray a little WD40 on to lubricate the cutter

@TheM750 2 года назад

WD-40 isn't a lubricant. Try Tap Magic or A9, either would work well in a setup like this, although with 6061 and such light cuts on a machine like this, it's not really needed. A compressed air stream to clear the chips and provide a little cooling to the endmill would be ideal.

@crozwayne 2 года назад

@@TheM750 Its a well known fact to use WD40 on aluminium as a cutting fluid, it prevents BUE forming due to welding taking place between the carbide (or HSS) end mill

@tinkot Год назад

The problem you are facing is because the spindle is not balanced due to issues with the fan. I have been using this spindle for a couple of years and once you get the fan balanced it will run considerably quiter up to completely quiet, there are video's on youtube that explain how to do that. I took the time to redesign the fan to have a true center of gravity, you can find this part on thingiverse under the name 'Chinese 500w Spindle Fan (100% Balanced)'

@evansmott461 2 года назад

I find your videos excellent. In this video you mention a machine that uses a 2.2 kw water cooled spindle have you reviewed that machine ?

@999fugazi 2 года назад

Great content, thank you. Do you have any videos for your 6090 CNC you show in this video when discussing the water cooled spindle benefits? Couldnt see any in your channel videos list...

@pir869 2 года назад

why not mill the face with a fly cutter,it would be faster by making each pass cut wider,even two passes to get a full clean face should be faster than multiple small tool passes,i'm not knocking your method,i'm using proper engineering methods to face off a milled part. A machine shop could knock out a small fly cutter for you as the ER11 series collet might be hard to get off the shelf fly cutter shank sizes,would be worth the effort though as it could have replaceable indexing carbide inserts fitted. Looks good,i'd go for a bit more power on the spindle seeing this one cut the plate as i'm planning a 1m square mill,the bearing rails are 1m long so nearly 1m square,all steel welded frame,but a powerful spindle can make new gantry side plates to replace heavy welded steel parts from thick aluminium plate. I recommend everyone using a small mill with ideas to upgrade the spindle to watch lathe and milling youtube videos "this old tony" and "nycnc" are top notch tubers,as the principles are the same ,and a good spindle will be able to utilise better cutting tools and methods.

@LostCloudx4 2 года назад

Awesome video... But AHHH Lubricant even water for alloy :D

@murilomarques3532 2 года назад

This its exquisite! Astonshing awesome hahah u are a little Genius ! Please i have a question .. I got a 3018plus 500w...and the PSU that came along with the kit seems too weak maybe or ITS getting too noise at the system since one minut of milling causes complet freezing ... Assuming i could take another DC 24v 5a Power Through Jack , can i keep the 48v10a PSU at the board ? Or It MUST be Wired separetadly ? A board can get Burnt with this both PSU adding voltage? can i minimize RISKS by lowering down main PSU voltage for 24V keeping 10a and plug another 24v5a Through Jack ?

@mpa568 2 года назад

I have now seen a bunch of your Videos and decided to Abo. Thx for good content! How would you describe a conparism between this CNC and an 3018 max Metal, where all parts are Aluminium?

@666nacirema666 2 года назад

id really like to get one of these but i need something that has at least 255mm of work area for both axis. i could do a lot with one of these still. id buy one in a second if they made an extension kit for it

@mahiralsarsour-ib4xv Год назад

Can you sent a specified characteristic about the nema 17 48mm stepper motor??

@yancymuu4977 2 года назад

Really fantastic work! As you mention the stiffness should be better with the shorter gantry. I believe stiffness is proportional to the square of length. So 18 cm should be almost three times stiffer than 30 cm with same size support rods. Your video has given me the idea of designing some sort of substantial solid reinforcing parts to surround the ends of the 3018 rods and make them immobile. That is convert a 3018 to an 1818 --- giving up size in trade for stiffness. I would like to be able to machine aluminum with my 3018, and have already upgraded to a 500 watt spindle. Is there any possibility you could try out this idea? --- thanks

@AuroraTech 2 года назад

There is a CNC1310 in the market, but I am not sure what makes it so expensive: amzn.to/3o1nxS4 I would consider it if it costs around $200-$250, but not sure if the 500w spindle has enough X-axis travel on such a small machine.

@yancymuu4977 2 года назад

@@AuroraTech I will create a concept and make a drawing. I can put it on my google drive. I would much appreciate your thoughts on building something with aluminum or 3D printing.

@E_y_a_l 2 года назад

@@yancymuu4977 You don't need to trade up size, just replace the rods(and the bearings) with thicker ones.

@JohnHoranzy Год назад

@@AuroraTech It is a cute machine so it is expensive :- ) It has an excellent design and would be very rigid but the deal breaker is that you are locked into a basic 775 motor. Maybe they feed it 36 volts and get 90 Watts out of it. Maybe. But as one poster stated you would have to rebuild the Z axis to put a lager diameter motor on it. Otherwise, it seems woefully under powered for such a rigid frame. I had seriously considered this machine but then bought a 6090 2.2KW machine. Comgrow has done everything right with this machine. I will be purchasing this little one because it is portable and can be used for training purposes.

@MicrobyteAlan 2 года назад

Very nice video, thank you.

@woozleboy 2 года назад

I'm ready to place orders for the parts listed, and this looks to be ideal, but not having the STL file for the mount is a stopping point. Would you be willing to share that file? You've such a great job in this presentation and your work is greatly appreciated.

@AuroraTech 2 года назад

Please download from here: auroratechchannel.com/download/Comgrow_Robo_52mm_Spindle_Mount.zip I have included the STL, STEP and Fusion 360 format, so you can adjust the leadscrew nut hole according to what type of nut you have.

@woozleboy 2 года назад

@@AuroraTech Excellent! Your efforts have been fantastic and greatly appreciated.

@zouna007 2 года назад

Great video! How much would you say an entry level desktop CNC that can mill aluminum costs? (One that doesn't meed any upgrades)

@digiandhealth 2 года назад

Hi, top video. could you provide the feeding parameter for the 500W spindel?

@AuroraTech 2 года назад

For aluminum, I use 12,000 RPM at 100mm/min, 0.1-0.2mm depth of cut.

@luckylarry5112 2 года назад

Could you tell me the dia. of the x axis blue bushing? Thanks, I liked and subbed. Great vids!!!

@ebe-hero7052 2 года назад

I wish you would make some something 3d. Like a simple smartphone prope carved from wood would be nice.

@1FishinAddict Год назад

Have you tried 500w brushless motor ? It’s super quiet

@donaldhollingsworth3875 2 года назад

The only thing I would add is using a ball end end mill making a cleanup .010 pass to cleanup your surface finish.

@sofghost6663 Год назад

Do you have a link to the .stl for the spindle mount?

@Loochy808 2 года назад

Can anyone explain to me how the lead screw installs? Are we taking the longer piece with the two screw holes into the notched top half, and then inserting the spring followed by the other half on the other side?

@Loochy808 2 года назад

Ohhhh.... you dont use the spring and the bottom half do you?

@pierregelinas9120 2 года назад

Hi , you are amazing at your age being such knowledgeable, I've got a question, i have the same Setup but where do you plug the Relay on the Comgrow mainboard? I've tried a few with the said relay plug on the board and played with the switch but can not control the motor with the relay but still can start the spindle...directly

@AuroraTech 2 года назад

Hi! Just connect the relay to the original spindle connector, when the machine tries to turn on the original spindle, it's going to trigger the relay instead.

@pierregelinas9120 2 года назад

@@AuroraTech kk i m going to try it again ,Dear , but I d think I have tried it .. but hey ill go and try it later , thanks for a fast reply!

@dbaker059 2 года назад

With the 500 W spindle upgrade and a carbide tip would this set up be adequate for brass applications?

@miragebleu5055 2 года назад

thank you very much.. but spindle is Currently unavailable!!!!

@AM-ob7yi 2 года назад

did you balance the fan on the spindles? i was told that the vibration can be reduced by balancing the fan.

@garretthaney9134 2 года назад

....some kids get all the best toys.

@MrMorgalis 2 года назад

hi there nice video , ordered a comgrow also. i will do the 500w spindle upgrade too; is t possible to get your stl file? thanks in advance

@AuroraTech 2 года назад

@MrMorgalis 2 года назад

@@AuroraTech Thanks my cnc comgrow arrived in 5 days , pritty fast. doing some tests already. Now i need to wait for the 500w spindle, but i saw some revieuws about an 300w one that should be enough for cutting aluminium. less noice, vibrations .... anyway thanks for the file and keeo up your good work

@user-ph7xj8si9z 2 года назад

Спасибо за полезную инфу.👍

@peerrucke2599 Год назад

dude...temps are rising why is there no cooling fluid

@comeoutandpla 2 года назад

Would this be capable of engraving hardened steel to about .005”

@stephan.scharf 2 года назад

Your channel is growing and growing and I definitely don't know why ... LOL

@jdduncan 2 года назад

What percent of infill did you use for the spindle mount?

@AuroraTech 2 года назад

100% infill

@djoleat 2 года назад

i use 800w and just slow down power to 500 😉

@klave8511 2 года назад

Sounds like the 800W spindle is just a 500W spindle made to run faster than it should.

@djoleat 2 года назад

@@klave8511 it is bigger, stronger, more power motor, and work on slow speed is easy for it, and best option for that

@seancsv 2 года назад

Maybe the 800W moter needed some balancing. Check out Matt Wall's video ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-ZsAEgR7S2tE.html

@lookin4ward1 2 года назад

Screw nuts sold out?

@landonhillyard 2 года назад

Now cut a spindle mount from aluminum!

@guser210 2 года назад

Neither, a 600W is better the shaft is thicker and more rigid than those two.

@user-bb9ur9wq3n Год назад

Отличная попытка. Хитро.

@ricaurandt6713 2 года назад

What happened to Bobby n his propane n propane accessories Dad next door? Shouldn't you be involved in some kinda school play or a Christmas Pageant or somethin?